* {
    margin: 0;
    padding: 0;
    border: 0;
    outline: 0;
    text-decoration: none;
    list-style: none;
    box-sizing: border-box;
}

:root {
    --color-red: #e9371f;
    --color-blue: #2856ee;
    --color-sky: #23b7f1;
    --color-green: #3f9743;
    
    --color-primary: #6c63ff;
    --color-success: #00bf8e;
    --color-warning: #f7c94b;
    --color-danger: #f75842;
    --color-danger-variant: rgba(247, 88, 66, 0.4);
    --color-white: #fff;
    --color-light: rgba(255, 255, 255, 0.7);
    --color-black: #000;
    --color-bg: #1f2641;
    --color-bg1: #2e3267;
    --color-bg2: #424890;

    --container-width-lg: 80%;
    --container-width-md: 90%;
    --container-width-sm: 94%;

    --transition: all 400ms ease;
}

body {
    font-family: 'Montserrat', sans-serif;
    line-height: 1.7;
    color: var(--color-white);
    background: var(--color-bg);
}

.container {
    width: var(--container-width-lg);
    margin: 0 auto;
}

section {
    padding: 6rem 0;
}

section h2 {
    text-align: center;
    margin-bottom: 4rem;
}

h1, h2, h3, h4, h5 {
    line-height: 1.2;
}

h1 {
    font-size: 2.4rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.6rem;
}

h4 {
    font-size: 1.3rem;
}

a {
    color: var(--color-white);
}

img {
    width: 100%;
    display: block;
    object-fit: cover;
}

.btn {
    display: inline-block;
    background: var(--color-white);
    color: var(--color-black);
    padding: 1rem 2rem;
    border: 1px solid transparent;
    font-weight: 500;
    transition: var(--transition);
}

.btn:hover {
    background: transparent;
    color: var(--color-white);
    border-color: var(--color-white);
}

.btn-primary {
    background: var(--color-danger);
    color: var(--color-white);
}

/* ==================== START NAVBAR ==================== */
nav {
    background: transparent;
    width: 100vw;
    height: 4rem;
    position: fixed;
    top: 0;
    z-index: 11;
}

/* Change navbar style on scroll using javascript */
.window-scroll {
    background: var(--color-black);
    box-shadow:  0 1rem 2rem rgba(0, 0, 0, 0.2);
}

.nav__container {
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav__container video {
    margin-top: .5rem;
    border-radius: .3rem;
}

.nav__container #open-menu-btn, #close-menu-btn {
    margin-right: 3%;
}

/* .nav__container .groupLogo {
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: .5rem;
} */

.nav__container img {
    border-radius: 5px;
    width: 40px;
    /* height: 45px; */
}

nav button {
    display: none;
}

.nav__menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav__menu a {
    font-size: 0.9rem;
    transition: var(--transition);
}

.nav__menu a:hover {
    color: var(--color-green);
}

.groupLogo {
    
}

/* ==================== END NAVBAR ==================== */

/* ==================== START HEADER ==================== */
header {
    position: relative;
    top: 5rem;
    overflow: hidden;
    height: 70vh;
    margin-bottom: 5rem;
}

.header__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 2rem;
    height: 100%;
}

.header__left p {
    margin: 1rem 0 1.5rem;
}

.header__left a {
    padding: 0.5rem;
    border-radius: 2rem;
    box-shadow: .5rem .5rem .5rem 0 rgba(139, 139, 139, 0.5);
}

.header__left a:hover {
    padding: 0.5rem;
    border-radius: 2rem;
    box-shadow: .5rem .5rem .5rem 0 rgba(0, 0, 0, 0.5);
    background: var(--color-green);
}

.header__right .header__right-image .slides {
    display:none;
    box-shadow: 1rem 1rem 1rem 0 rgba(139, 139, 139, 0.5);
}

.header__right .header__right-image .slides:hover {
    box-shadow: 1rem 1rem 1rem 0 rgba(0, 0, 0, 0.5);
}
/* ==================== END HEADER ==================== */

/* ==================== START CATEGORIES ==================== */
.categories {
    background: var(--color-bg1);
    /* height: 29rem; */
}

.categories h1 {
    line-height: 1;
    margin-bottom: 3rem;
}

.categories__container {
    display: grid;
    grid-template-columns: 40% 60%;
    /* margin-top: .2rem; */
}

.categories__left {
    margin-top: 2rem;
    margin-right: 4rem;
}

.categories__left p {
    margin: 1rem 0 3rem;
}

.categories__left a {
    margin-top: 1.5rem;
    box-shadow: .5rem .5rem .5rem 0 rgba(139, 139, 139, 0.5);
    padding: 0.5rem;
    border-radius: 2rem;
    background: var(--color-green);
    color: var(--color-white);
}

.categories__left a:hover {
    background: var(--color-sky);
    color: var(--color-white);
    box-shadow: .5rem .5rem .5rem 0 rgba(0, 0, 0, 0.5);

}

.categories__left .logoimg {
    width: 100%;
    box-shadow: 1rem 1rem 1rem 0 rgba(139, 139, 139, 0.5);
}

.categories__left .logoimg:hover {
    box-shadow: .5rem .5rem .5rem 0 rgba(0, 0, 0, 0.5);
    z-index: 1;
}

.categories__right {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.2rem;
    /* align-items: center; */
}

.categories__right img {
    /* margin-top: 2.5rem; */
    width: 100%;
}

.category {
    background: var(--color-bg2);
    padding: 1rem;
    border-radius: 2rem;
    transition: var(--transition);
    box-shadow: .5rem .5rem .5rem 0 rgba(139, 139, 139, 0.5);
    margin-bottom: 1rem;
}

.category:hover {
    box-shadow: .5rem .5rem .5rem 0 rgba(0, 0, 0, 0.5);
    z-index: 1;
}

.category:nth-child(1) .category__icon {
    background: var(--color-green);
}

.category:nth-child(2) .category__icon {
    background: var(--color-red);
}

.category:nth-child(3) .category__icon {
    background: var(--color-blue);
}

.category:nth-child(4) .category__icon {
    background: var(--color-black);
}

.category:nth-child(5) .category__icon {
    background: var(--color-sky);
}

.category__icon {
    background: var(--color-primary);
    padding: 0.4rem;
    border-radius: 0.9rem;
}

.category h5 {
    margin: 1rem 0 1rem;
}

.category p {
    font-size: 0.85rem;
}
/* ==================== END CATEGORIES ==================== */

/* ==================== START COURSES ==================== */
.courses {
    /* margin-top: 10rem; */
}

.courses__container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.course {
    background: var(--color-bg1);
    text-align: center;
    border: 1px solid transparent;
    transition: var(--transition);

    box-shadow: 1rem 1rem 1rem 0 rgba(139, 139, 139, 0.5);
}

.course:hover {
    background: transparent;
    border-color: var(--color-primary);

    box-shadow: 1rem 1rem 1rem 0 rgba(0, 0, 0, 0.5);
    z-index: 1;
}

.couese__image img {
    width: 100%;
    height: 250px;
    /* margin-top: 2rem; */
}

.course__info {
    padding: 2rem;
}

.course__info a {
    margin: 1.2rem 0 0;
    font-size: 1rem;

    border-radius: 1rem;
    background: var(--color-green);
    color: var(--color-white);
}
/* ==================== END COURSES ==================== */

/* ==================== START FAQS ==================== */
.faqs {
    background: var(--color-bg1);
    box-shadow: inset 0 0 3rem rgba(0, 0, 0, 0.5);
}

.faqs img {
    width: 7rem;
    height: 7rem;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.faqs__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.faq {
    padding: 2rem;
    display: flex;
    align-items: center;
    gap: 1.4rem;
    height: fit-content;
    background: var(--color-white);
    color: var(--color-black);
    cursor: pointer;
    border-radius: 4rem;
    /* box-shadow: inset 0 0 3rem rgba(0, 0, 0, 0.5); */
    box-shadow: .5rem .5rem .5rem 0 rgba(139, 139, 139, 0.5);
}

.faq:hover {
    box-shadow: .5rem .5rem .5rem 0 rgba(0, 0, 0, 0.5);
}

.faq h4 {
    font-size: 1rem;
    line-height: 2.2;
}

.faq__icon {
    align-self: flex-start;
    font-size: 1.2rem;
}

.faq p {
    margin-top: 0.8rem;
    display: none;
}

.faq.open p {
    display: block;
}
/* ==================== END FAQS ==================== */

/* ==================== START TESTIMONIALS ==================== */
.testimonials__container {
    overflow: hidden;
    position: relative;
    margin-bottom: 5rem;
}

.testimonial {
    /* padding-top: 2rem; */
}

.avatar {
    width: 8rem;
    height: 8rem;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 1rem;

    box-shadow: .5rem .5rem .5rem 0 rgba(139, 139, 139, 0.5); 
}

.avatar:hover {
    box-shadow: .5rem .5rem .5rem 0 rgba(0, 0, 0, 0.5); 
}

.testimonial__info {
    text-align: center;
    margin-top: 1.5rem;
}

.testimonial__body {
    background: var(--color-green);
    color: var(--color-white);
    padding: .8rem;
    margin-top: 3rem;
    position: relative;
    text-align: center;

    font-weight: bold;
    box-shadow: .5rem .5rem .5rem 0 rgba(139, 139, 139, 0.5);
}

.testimonial__body::before {
    /* content: "";
    display: block;
    background: linear-gradient(
        135deg,
        transparent, 
        var(--color-white), 
        var(--color-white),
        var(--color-white)
    );
    width: 3rem;
    height: 3rem;
    position: absolute;
    left: 40%;
    top: -1.5rem;
    transform: rotate(45deg); */
}

.testimonial__body:hover {
    box-shadow: .5rem .5rem .5rem 0 rgba(0, 0, 0, 0.5);
}
/* ==================== END TESTIMONIALS ==================== */

/* ==================== START FOOTER ==================== */
footer {
    background: var(--color-bg1);
    /* padding-top: 5rem; */
    font-size: 0.9rem;
}

.footer__container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 5rem;
}

.footer__container > div h4 {
    margin-bottom: 1.2rem;
}

.footer__1 p {
    margin: 0 0 2rem;
}

footer ul li {
    margin-bottom: 0.7rem;
}

footer ul li a:hover {
    text-decoration: underline;
}

.footer__socials {
    display: flex;
    gap: 1rem;
    font-size: 1.2rem;
    margin-top: 2rem;
}

.footer__copyright {
    text-align: center;
    margin-top: 4rem;
    padding: 1.2rem 0;
    border-top: 1px solid var(--color-bg2);
}
/* ==================== END FOOTER ==================== */

.animeX {
    position: relative;
    transform: translateY(50px);
    opacity: 0;
    transition: all 2s ease;
}

.animeX.active {
    transform: translateY(0px);
    opacity: 1;
}

/* ==================== START MEDIA QUERIES (TABLETS) ==================== */
@media screen and (max-width: 1024px) {
    /* Check body size */
    /* body {background: red;} */

    .container {
        width: var(--container-width-md);
    }

    h1 {
        font-size: 2.2rem;
    }

    h2 {
        font-size: 1.7rem;
    }

    h3 {
        font-size: 1.4rem;
    }

    h4 {
        font-size: 1.2rem;
    }

    /* ==================== START NAVBAR ==================== */
    nav button {
        display: inline-block;
        background: transparent;
        font-size: 1.8rem;
        color: var(--color-white);
        cursor: pointer;
    }

    nav button#close-menu-btn {
        display: none;
    }

    .nav__menu {
        position: fixed;
        top: 5rem;
        right: 5%;
        height: fit-content;
        width: 18rem;
        flex-direction: column;
        gap: 0;
        display: none;
    }

    .nav__menu li {
        width: 100%;
        /* height: 5.8rem; */
        height: 4rem;
        animation: animateNavItems 400ms linear forwards;
        transform-origin: top right;
        opacity: 0;
    }

    .nav__menu li:nth-child(2) {
        animation-delay: 200ms;
    }

    .nav__menu li:nth-child(3) {
        animation-delay: 400ms;
    }

    .nav__menu li:nth-child(4) {
        animation-delay: 600ms;
    }

    .nav__menu li:nth-child(5) {
        animation-delay: 800ms;
    }

    @keyframes animateNavItems {
        0% {
            transform: rotateZ(-90deg) rotateX(90deg) scale(0.1);
        }
        100% {
            transform: rotateZ(0) rotateX(0) scale(1);
            opacity: 1;
        }
    }

    .nav__menu li a {
        /* background: var(--color-primary); */
        box-shadow: -4rem 6rem 10rem rgba(0, 0, 0, 0.6);
        width: 100%;
        height: 100%;
        display: grid;
        place-items: center;

        background: var(--color-black);
        color: var(--color-white);
        box-shadow: 1rem 1rem 1rem 0 rgba(139, 139, 139, 0.5);
    }

    .nav__menu li a:hover {
        background: var(--color-bg2);
        color: var(--color-white);
    }
    /* ==================== END NAVBAR ==================== */

    /* ==================== START HEADER ==================== */
    header {
        height: 52vh;
        margin-bottom: 4rem;
    }

    .header__container {
        gap: 1;
        padding-bottom: 3rem;
    }
    /* ==================== END HEADER ==================== */

    /* ==================== START CATEGORIES ==================== */
    .categories {
        height: auto;
    }

    .categories__container {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .categories__left {
        margin-right: 0;
    }
    /* ==================== END CATEGORIES ==================== */

    /* ==================== START POPULAR COURSES ==================== */
    .courses {
        margin-top: 0;
    }

    .courses__container {
        grid-template-columns: 1fr 1fr;
    }
    /* ==================== END POPULAR COURSES ==================== */

    /* ==================== START FAQs ==================== */
    .faqs__container {
        grid-template-columns: 1fr;
    }

    .faq {
        padding: 1.5rem;
    }
    /* ==================== END FAQs ==================== */

    /* ==================== START FOOTER ==================== */
    .footer__container {
        grid-template-columns: 1fr 1fr;
    }
    /* ==================== END FOOTER ==================== */
}

@media screen and (max-width: 600px) {
    /* body {
        background: red;
    } */

    .container {
        width: var(--container-width-sm);
    }

    /* ==================== START NAVBAR ==================== */
    .nav__menu {
        right: 3%;
    }
    /* ==================== END NAVBAR ==================== */

    /* ==================== START HEADER ==================== */
    header {
        height: 100vh;
    }
    
    .header__container {
        grid-template-columns: 1fr;
        text-align: center;
        margin-top: 0;
    }

    /* .header__left a {
        margin-bottom: 1.3rem;
    } */

    .header__right-image {
        margin-bottom: 2.5rem;
    }
    /* ==================== END HEADER ==================== */

    /* ==================== START CATEGORIES ==================== */
    .categories__right {
        grid-template-columns: 1fr 1fr;
        gap: 0.7rem;
    }

    .category {
        padding: 1rem;
        border-radius: 1rem;
    }

    /* .category__icon {
        padding: .6rem;
        margin-top: 4px;
        display: inline-block;
    } */  
    /* ==================== END CATEGORIES ==================== */

    /* ==================== START CoURSES ==================== */
    .courses__container {
        grid-template-columns: 1fr;
    }
    /* ==================== END CoURSES ==================== */

    /* ==================== START TESTIMONIALS ==================== */
    .testimonial__body {
        padding: 1.2rem;
    }
    /* ==================== END TESTIMONIALS ==================== */

    /* ==================== START FOOTER ==================== */
    .footer__container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .footer__1 p {
        margin: 1rem auto;
    }

    .footer__socials {
        justify-content: center;
    }
    /* ==================== END FOOTER ==================== */



}
/* ==================== END MEDIA QUERIES (TABLETS) ==================== */